研究了乙酸龙脑酯标准样品的制备 、 均匀性和稳定性及其定值方法.用英语怎么说？

研究了乙酸龙脑酯标准样品的制备 、 均匀性和稳定性及其定值方法.

Preparation, homogeneity, stability and certification of reference substance of bornyl acetate were studied.

preparation

n. 准备，预备，准备工作，配制品，制剂；

例句
You could never eliminate risk, but preparation and training could attenuate it...
风险不可能完全消除，但可以通过防范和培训来降低。

homogeneity

n. 同种，同质，同次性，一致性，齐性，均匀性；

例句
The quality , optical transmissivity and homogeneity of the sapphire boule have remarkably improved.
经测试,Al2O3晶体的完整性 、 光学透过率和光学均匀性均有显著提高.

stability

n. 稳定（性），稳固，坚定，恒心；

例句
NATO had charted a new course for stability and cooperation in Europe...
北约制订了保持欧洲稳定与合作的新计划。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

certification

n. 证明，鉴定，证书；

例句
Airworthiness certification includes Type Certification and Production Certification , and other related work.
适航审定主要包括型号合格审定和生产许可审定及其他工作.

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

reference

n. 参考，参考书，提及，涉及，证明人，介绍人；v. 引用，参照；

例句
...a colour coding that will ensure easy reference for potential users.
确保潜在用户查阅方便的颜色编码

substance

n. 物质，材料，实质，内容，[神]灵，（织品的）质地；

例句
This is how we see our tasks, and the substance and content of our work for the forthcoming period.
这就是我们对工作任务的看法，以及下一阶段我们工作的实质与内容。

bornyl

茨醇基，龙脑基；

例句
Preparation, homogeneity, stability and certification of reference substance of bornyl acetate were studied.
研究了乙酸龙脑酯标准样品的制备 、 均匀性和稳定性及其定值方法.

acetate

n. 醋酸盐，醋酸酯，醋酸纤维，醋酸人造丝；

例句
The reverse of Reaction 11 for acetate may be combined with the electron acceptor reactions.
对于醋酸盐、反应11的逆反应可以与电子接受体反应组合在一起.

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

studied

adj. 有计划的，故意的，深思熟虑的，精通的；v. 学习，研究( study的过去式和过去分词 )，想出，详细地检查，背诵（台词等）；

例句
At college he studied English and did amateur boxing.
大学时，他学习英语，同时还参加业余拳击。